A08 file format description

Many people share .a08 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .a08 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .a08 files.

.arj - ARJ Compressed Archive

ARJ file is an ARJ Compressed Archive. It is the native format of ARJ (dos) and WinARJ archiver. Like other archives, ARJ files are data containers, they store one or several files in the compressed form.

Naturally, other applications may also use the .a08 file extension. Even harmful programs can create .a08 files. Be especially cautious with .a08 files coming from an unknown source!

Can't open a .a08 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:

example.a08

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.

Select a file type in the list and click Change Program.

The .a08 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year: